Delaware State Police detectives arrested a man on Friday in connection with robbery and attempted robbery on Tuesday at two Wilmington-area pharmacies.

It was early Tuesday morning when Antoine L. Boston, 28, of New Castle, and another man entered a CVS pharmacy at 4020 Concord Pike, police said.

The other man, whom police call a suspect, walked to the rear of the store, while Boston approached an employee at the cash register and passed a note that read, "Put money in bag."

"The victim understood by the suspect's actions and demands that a robbery was occurring," the arresting officer said in an affidavit of probable cause.

The store employee handed over $224 in cash, according to the police investigation.

Boston then left the store, leaving the demand note behind, police say. A minute later, the other man left.

Later in the morning, police believe Boston entered a Walgreens pharmacy at 1812 Marsh Road. With a Wawa fountain drink in hand, he purchased a pack of cigarettes with cash and then walked out, according to police.

Two minutes later, Boston returned and approached the pharmacy clerk again, police said.

"The suspect then solicited the victim for a lighter and placed a note on the counter, which read, 'put the money in the bag,'" the police affidavit stated.

But the clerk was unable to open the register, police said, and so Boston fled the store with the demand note but with no cash.

Police found the Wawa fountain cup in a trash bin outside the Walgreens. Investigators used the cup and the demand note from the CVS robbery to link the crimes to Boston, according to the affidavit.

Following his arrest on Friday, Boston was taken to Howard R. Young Correctional Institution. He was charged with second-degree robbery, second-degree attempted robbery, and second-degree conspiracy.

Anyone with additional information about the robberies should contact State Police Detective T. Dukes of the Troop 2 Robbery Unit at 302-365-8412. Information can also be provided at Delaware crime stoppers at 1-800-TIP-3333 or online at www.delaware.crimestoppersweb.com.

Contact Karl Baker at kbaker@delawareonline.com or (302) 324-2329. Follow him on Twitter @kbaker6.